# vImageCreateMonochromeColorSpaceWithWhitePointAndTransferFunction(_:_:_:_:_:) Creates a monochrome color space based on primitives from Y’CbCr specifications. ``` func vImageCreateMonochromeColorSpaceWithWhitePointAndTransferFunction(_ whitePoint: UnsafePointer, _ tf: UnsafePointer, _ intent: CGColorRenderingIntent, _ flags: vImage_Flags, _ error: UnsafeMutablePointer!) -> Unmanaged! ``` ## Parameters `whitePoint` Values that define the white point. `tf` The transfer function. `intent` A rendering intent constant that specifies how to handle colors that aren’t within the gamut of the destination color space. `flags` The options to use when performing the operation. This function supports only [`kvImagePrintDiagnosticsToConsole`](/documentation/Accelerate/kvImagePrintDiagnosticsToConsole), which prints diagnostic information to the console in the event of a failure. `error` A pointer to a [`vImage_Error`](/documentation/Accelerate/vImage_Error). The function overwrites the pointer to indicate the success or failure of the operation. ## Return Value A with a reference count of one. ## Discussion Use this function to create a instance to correspond with a specified white point and a transfer function. The instance defines a monochrome color space. (A Y’CbCr color space is an RGB color space and a conversion matrix from RGB to Y’CbCr.) The white point provides the extent of a color space in XYZ space, and the transfer function provides the transformation from linear color to nonlinear color that the pixels reside in. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)